X-ray Cherenkov radiation produced in multilayers

M. A. Aginian; L. A. Gevorgian; K. A. Ispirian; M. K. Ispiryan

doi:10.1117/12.640000

7 December 2006 X-ray Cherenkov radiation produced in multilayers

M. A. Aginian, L. A. Gevorgian, K. A. Ispirian, M. K. Ispiryan

Proceedings Volume 5974, International Conference on Charged and Neutral Particles Channeling Phenomena; 59740P (2006) https://doi.org/10.1117/12.640000
Event: International Conference on Charged and Neutral Particles Channeling Phenomena, 2004, Rome, Italy

Abstract

It is well known that when some conditions are fulfilled the intensity of the radiation produced by high energy particles in stratified media or the so-called "parametric Cherenkov radiation" is enhanced. On the other hand, it has been predicted and observed that in some materials the dielectric constant is greater than 1 in X-ray region near the absorption edges, and quasimonochromatic X-ray Cherenkov radiation (XCR) photons are produced with certain angular and narrow spectral distributions. Recently new formulae have been derived by the coherent summation method for the radiation produced by fast charged particles in multilayers consisting of thin alternating layers of two materials with different dielectric constants. In difference from the coherent transition radiation formulae obtained in WKB approximation or coherent summation method the new formulae take into account the reflection from the interfaces and is valid when the dielectric constants are greater andor less than 1. In this work we study the angular and spectral distributions of XCR using these formulae, compare the obtained results with the results obtained theoretically and experimentally in other works and discuss some possible experiments.

Citation Download Citation

M. A. Aginian, L. A. Gevorgian, K. A. Ispirian, and M. K. Ispiryan "X-ray Cherenkov radiation produced in multilayers", Proc. SPIE 5974, International Conference on Charged and Neutral Particles Channeling Phenomena, 59740P (7 December 2006); https://doi.org/10.1117/12.640000

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